by Cabibbo, Nicola, Swallow, Earl C, Winston, Roland
Published in Physical review letters (25.06.2004)

by Tsamis, N.C., Woodard, R.P.
Published in Physics letters. B (11.03.1993)

by Hall, LJ, Sarid, U
Published in Physical review letters (03.05.1993)

by Censor, D.
Published in Journal of electromagnetic waves and applications (01.01.1998)

by Cougo-Pinto, M. V., Farina, C., Segu -Santonja, Antonio J.
Published in Letters in mathematical physics (01.02.1994)

by Cougo-Pinto, M. V., Farina, C., Segu -Santonja, A. J.
Published in Letters in mathematical physics (01.08.1994)

by Zimmermann, Wolfhart
Published in Letters in mathematical physics (01.01.1994)

by Kijowski, J., Rudolph, G.
Published in Letters in mathematical physics (01.10.1993)

by Vanyashin, Vladimir
Published in Letters in mathematical physics (01.06.1994)

by Cheng, HY, Tseng, B
Published in Physical review. D, Particles and fields (01.11.1993)

by Hong, DK, Lee, T, Park, SH
Published in Physical review. D, Particles and fields (15.10.1993)

by Warke, CS, Bhalerao, RS
Published in Physical review. D, Particles and fields (01.12.1992)